Rotatable tubing hanger



Nov. 22, 1927.

s. P. TscHAPPA-r ROTATABLE TUBING HANGER- Filed Sept. 13. 1926 72.fumo/1N f TSCHAPPAT,

gwwntoz attormq Patented Nov. 22, 1927.

UNiTED STATES 1,650,102 PATENT OFFICE.

SHERIDAN P. TSCHAPPAT, OF TULSA, OKLAI-IOIVIA,V ASSIGNOR F ONE-HALF T0HAROLD CALLAHAN,- OF TULSA, OKLAHOMA.

ROTATABLE TUBING HANGER.

'^' Application filed September 13, 1926. Serial No. 135,190.

My invention relates to a rotatable tubing hanger, used in connectionwith oil wells.

As is well known, a well drilled with a rotary outfit, is very crooked,in parts. As a result of this, the sucker rods operating in string oftubing, in such a well, continually wear against the side of the tubing,frequently cutting through the same, making it necessary to pull andreplace the tubing. Under these conditions, it is frequently necessaryto pull the tubing, for replacing the worn tubing sections, asfrequently as once a week.

ln accordance with my invention, the tubing is suspended by a memberwhich may be turned, and the pumper may, therefore, turn the tubingslightly, at intervals, such as each morning thereby changing theposition of Contact between the sucker rods and the tubing'whereby thelife of the tubing is greatly prolonged. In addition to the provision ofmeans to permit of turning of the tubing, the hanger is designed tosuspend the/tubing on the casing head, at the top of the well,

v by means of slips which grip around the tubing, as distinguished fromthe old method of hanging the tubing by en aging the cou pling of thetubing. The evice also provides means to pack off gas and fluid betweenthe casing head and tubing, where there is considerable pressure.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

In the accompanying drawings, forming a part of this specification, andin which like `numerals are employed to designate like parts throughoutthe same,

Figure 1 is a side elevation of a tubing hanger embodying my invention,the casing head being shown in sections,

Figure 2 1s a central vertical sectionv through the tubing hanger,

Figure 3 is a plan view of the device, and, .Figure 4 is a horizontalsection taken on line 4-4 of Figure 2.

In thedrawmgs, wherein for the purpose of illustration, is shown apreferred embodi-' ment of my invention, the numeral 10 designates apreferably cylindrical outer casing or bowl, having a lower portion` 11which is tapered and increases in diameter downwardly. The lower end ofthis outer bowl is adapted to be arranged within the open end ofthecasing head 12, and may Nrest upon a shoulder 13,with packing 14interposed between the adjacent parts. The outer bowl 10 may be clampedin position by means of bolts 15, engaging the tapered portion 11.

The outer bowl 10 is provided with an annular bottom 16, for the passageofthe tubing 17. This annular bottom supports an end thrust ballbearing, embodying a lower annular ring 18, resting upon the annularbott-om 16 and an upper annular ring 19, said rings lia-ving grooves 20,for the reception of bearing balls 21, as shown.

Rotatable within the outer bowl 10 is an inner bowl 22, the periphery ofwhich is cylindrical. This inner rotatable bowl 22 i-s provided at `titsbottom with an annular groove 23, for the reception of an upstandingannular rib 24, formed upon the upper annular ribl 19. The inner bowl 22has its bore 25 tapered, and decreases in diameter downwardly.

Arranged within the innerrotatable bowl 22 are sli-ps 26. I preferablyemploy three of these slips although any suitable'number may be employedand the slips are preferably of the construction shown in my pendingapplication for tubing hanger, filed February 15, 1926, Serial No.88,272. However, any well known or preferred type' of slips may beemployed. These slips engage the tubing 17 and suspend the same, as isobvious.

The numeral 27 designates a washer, preferably formed of cast iron,which may be arranged upon the tops of the inner bowl 22 and the slips26. Arranged upon this washer is a packino' ring 28, preferably formedof rubber or other suitable material. This packing ring is engaged by acompression ring 29, which is screw-threaded at 30, for engagement withthe inner screw-threaded end 31 of the bowl 10. This compressing ring isprovided with an upper extension 32, having projections 33 forconvenient engagement with a wrench or the like for turning the same.

In view of the foregoing description, it is apparent that the tubing 17is directly engaged by thel slips, and supported thereby and accordinglylsuspended at the casing head 12. By screwing down the compression ring,29, the packing ring 28 may be placed under suit-able compression and atight joint effected, packing oil as or oil. When it is desired to turnthe tu ing, the pumper may 11o suitably loosen the compression ring 29,if necessary, and the tubing may be engaged by a wrench and slightlyturned. ln this action, the slips 26 turn with the tubing and the innerbowl 22 turns within the outer bowl l0, by virtue of the ball bearingsupporting the same. lit is to be understood that the form oi myinvention, herewith shown and described is to be taken as a preferredexample of the same, and that various changes in the shape, eine andarrangement of parts may be resorted to without departing from thespirit of my invention, or the scope of the subjoined claimso Havingthus claimz l, A rotatable tubing hanger comprising an outer bowl to bearranged upon the casing bead and adapted for the passage of the tubing,an inner bowl rotatable lwithin the outer bowl, slips within the innerbowl tor described my invent-ion, l

vengaging the tubing, a compressible packing ring arranged within theouter bowl above the inner bowl and slips forming a gastight joint, anda compression ring adapted to be drawn into the outer bowl forengagement with the compressible packing ring.

2. A rotatable tubing hanger comprising an outer bowl to be arrangedupon a casing head and adapted for the passage ot the tubing, an innerbowl rotatable within the outer bowl, a ball bearing arranged betweenthe parts of the inner and outer bowls, slips'l within the inner bowltor engaging the tub-i ing, a oompressible packing ring arranged l Vanouter bowl to be arrang head and adapted for the passage of the ttubing, an inner bowl rotatable within ther" within the outer bowl toform a gas-tight joint above the inner bowl, and a compres sion ringadapted to be drawn into the outer bowl for engagement with the packing.

3. A rotatable tubing han er comprising upon a casing neeonioa outerbowl, an end` thrust bearing arranged between the bottoms of the inn-erand outer bowls, slips arranged within the inner bowl for engagementwith the tubing, a compressible packing ring Within the top of the outerbowl to form a gas-tight joint. and a compression ring operating withinthe top of the outer bowl above the packing.

el, A rotatable tubing hanger comprising an outer bowl to be arrangedupon the casing head and adapted for the passage of the tubing. saidbowl being provided at its bottom with a lateral shoulder, an inner bowlrotatable within the outer bowl and having a tapered bore andterminating at its top at an elevation beneath the top ot the outerbowl, an end-thrust bearing arranged between thebottom of the inner bowland the shoulder of the outer bowl, slips arranged yring and havingscrew-threaded engagement within the outer bowl.

5. A rotatable tubing hanger comprising an outer bowl to be arrangedupon the cas ing head and adapted'tor the passage o: the tubin aninnerbowl mounted within the outer y owl to turn with relation theretoand having a tapered bore, the top of the inner bowl terminating at anelevation below the top ot the outer bowl, slips within the tapered boreof the inner bowl, a compressible packing ring arranged within the outerbowl above the slips for forming a gas-tight joint, and a compressionrin above the compressible packing ring an adapted to be moed downwardlyinto engagement therewit -In testimony whereof li amx my signature.

SHERIDAN P. TSGHAPPAT.

